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Well, just committed to buy a tire grooving/siping tool (ebay). I hope it comes with instructions. :-) Kind of means that I'm staying with NDCC tires after all.

Westech, can you give us some particulars about the siping? Depth, pattern, number of cuts etc? I have more or less decided to stay with NDCC's but will try the siping bit on my next batch to increase traction on wet pavement. Thanks,

Thanks for the come-back, Westech, that's what I like to hear! Another item for the to-do list.

Noticed that the tire siping tool is also called "tire groover", lots of hits on google.

Thanks for your answers! From what I can find on Google etc, there is a hand held siping tool that is used to slice the tread for better wet pavement traction. Works like the old deck shoes. Does anybody have any experience with this? When siping is done on a machine, the NDCC tread "lugs" may...

What tire do you have Robert? 386-something?

Is there an index, number or an established methode to measure wet pavement traction for commonly used deuce tires? We know the radials are far better than the bias ply NDCC's, but what are the numbers? What about siped NDCC's? The measurement should apply to new and used (say 50%) tires. On...